Question about Samsung LE40R74BDX 40 in. LCD Television

3 Answers

Samsung LE40R51B no picture but turns on

Hello experts,

my Samsung 40'' LCD TV turns on and swiches channels, plays sound, but does not show any picture. You can see the background light. But its black all the time. What can be the problem? some electronic in the LCD or could be the LCD panel faulty?

regards

Simon

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  • clean_cut_05 Apr 07, 2008

    I have a samsung 40" lcd to and it turns on for about 9 sec then the screen goes blank. The tv stays on but no picture, then if i turn it off and back on again it works again for another 9 seconds. What do you think this is?

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Tcon is dead replace it
Tcon module # 400w2c4ltv0.1

Posted on Nov 24, 2013

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  • 23 Answers

Try to replace CAPACITORS with value 1000uf 25 volts, replace them with 1000uf and 35 volts, the power supply overcharges the capacitors due to powerpeaks of 29.7volts, the priginal capacitors cant handle those peaks,.. in the menu turn off options dynamic contrast and digital noise filter and all is fine again! it worked on my samsung.
Yours sincerely,

Dennis

Posted on Apr 04, 2013

  • dndmusic
    dndmusic Apr 04, 2013

    try to replace CAPACITORS with value 1000uf 25 volts, replace them with 1000uf and 35 volts, the power supply overcharges the capacitors due to powerpeaks of 29.7volts, the priginal capacitors cant handle those peaks,.. in the menu turn off options dynamic contrast and digital noise filter and all is fine again! it worked on my samsung.
    Yours sincerely,

    Dennis

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I have the same problem i was told by a repairman that samsungs are known for bad psu. and that its expensive to repair

Posted on Feb 05, 2008

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